Move apply_from_sdcard to fuse_sdcard_install

Move the sdcard installation function and all helper functions to a
separate file, and drop the dependency on common.h.

In the future, we want to move these functions into the install class.

Bug: 127071893
Test: unit tests pass
Change-Id: I0b7f7cbf0b68918e638e13878ca28bfca367088a

adb_install.cpp

@@ -35,7 +35,6 @@
 #include "ui.h"
 
 int apply_from_adb(bool* wipe_cache) {
-  modified_flash = true;
   // Save the usb state to restore after the sideload operation.
   std::string usb_state = android::base::GetProperty("sys.usb.state", "none");
   // Clean up state and stop adbd.